缺乏下列哪种维生素可产生巨幼红细胞贫血()
A.维生素B2
B.维生素B1
C.维生素B12
D.泛酸
E.维生素C
参考答案:C
Used to TV shows, where everything is quick and entertaining, many people do not have the _______ to read a book that requires thinking.
A.courage
B.wisdom
C.patience
D.freedom
地陪应在旅游团出站前与行李员取得联络,通知行李员取得行李的()以及行李送往的()。